Fluorescent Calcium Dye
Fluorescent Calcium Dye - Related Videos
08:14
Assessing T-cell Receptor-Induced Calcium Influx Using a Calcium Indicator Dye
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2025
This video analyzes T-cell receptor-induced calcium influx in T-cells. Anti-CD3 antibodies activate the T-cell signaling pathways, leading to an increase in intracellular calcium ions that bind with Indo-1 dye. In flow cytometry, a spectrum shift from the calcium-free state to the calcium-bound state correlates with T-cell receptor-induced calcium influx.
09:32
Direct Imaging of ER Calcium with Targeted-Esterase Induced Dye Loading (TED)
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Cited by 60 •
2013
Targeted-esterase induced dye loading (TED) supports the analysis of intracellular calcium store dynamics by fluorescence imaging. The method bases on targeting of a recombinant Carboxylesterase to the endoplasmic reticulum (ER), where it improves the local unmasking of synthetic low-affinity Ca2+ indicator dyes in the ER lumen.
17:05
Loading a Calcium Dye into Frog Nerve Endings Through the Nerve Stump: Calcium Transient Registration in the Frog Neuromuscular Junction
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Cited by 13 •
2017
Here, we describe a method for loading a calcium-sensitive dye through the frog nerve stump into the nerve endings. We also present a protocol for the recording and analysis of fast calcium transients in the peripheral nerve endings.
02:42
Analyzing Synaptic Vesicle Recycling and Fluorescent Dye Uptake in Drosophila Larvae
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2025
This video demonstrates a protocol to study synaptic vesicle recycling at neuromuscular junctions in channelrhodopsin-expressing Drosophila larvae using a fluorescent dye. Blue light activates the channelrhodopsins, causing calcium influx and synaptic vesicle exocytosis. The dye integrates into the neuronal membranes and is internalized during endocytosis, resulting in enhanced fluorescence. Further blue light stimulation induces exocytosis and dye release, which is shown by reduced...
05:09
Delivery of a Fluorescent Dye into the Subretinal Space of a Mouse
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2025
Source: Parikh, S., et al. An Alternative and Validated Injection Method for Accessing the Subretinal Space via a Transcleral Posterior Approach. J. Vis. Exp. (2016)This video demonstrates the procedure for delivering a fluorescent dye into the subretinal space of a mouse. The process involves anesthetizing the mouse, preparing the eye, making precise incisions to access the subretinal space, and injecting the dye to create a controlled retinal detachment. This technique allows for targeted...
FAQs
The dye changes its optical properties when it binds Ca2+, producing a corresponding change in fluorescence. This molecular response links calcium binding to an observable imaging signal, allowing researchers to follow intracellular calcium changes over time rather than relying only on a fixed measurement. The resulting signal supports analysis of dynamic cellular signaling.
Tracking calcium dynamics shows how calcium changes during a biological response, including when signaling occurs and how it relates to cellular activity. These time-dependent measurements can help characterize signal transduction, secretion, contraction, and cell communication. For this reason, fluorescent calcium dyes are useful when researchers need to examine responses as they unfold in living cells.
Neurons and muscle cells are excitable cells whose activity can be associated with changes in intracellular calcium. Fluorescent calcium dyes provide a way to monitor those changes through fluorescence imaging, connecting cellular activity with calcium-dependent responses. This application helps researchers investigate signaling patterns related to communication, secretion, and contraction in these biologically active cell types.
A typical workflow begins by introducing the dye into cells, where it can bind intracellular Ca2+. Researchers then use fluorescence microscopy or another related imaging method to observe changes in the optical signal. Comparing fluorescence over time provides a real-time view of calcium responses and helps relate those changes to the cellular process under study.
These probes can support studies of signal transduction, secretion, contraction, and cell communication by revealing associated intracellular calcium changes. Their real-time readout allows researchers to examine how cells respond during active biological events. The approach is therefore relevant to experiments involving excitable cells as well as broader investigations of cellular regulation and response.
Researchers can use calcium imaging to compare intracellular responses across developmental conditions, disease-related states, or drug treatments. Differences in the observed fluorescence changes may help characterize how calcium regulation is altered under those conditions. This makes the technique valuable for connecting calcium dynamics with changes in cellular behavior and evaluating biological responses to experimental interventions.